Pulley.



H. J. GILBERT.

PULLEY. APPLIbATION FILED MAY 23. 1994.

Patented J an. 26, 1909.

2 SHEETS-SHEET 1.

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H. J. GILBERT. PULLEY.

AIPLIUATIOE FILED MAY 23. 1904.

910,527. Patented Jan.26,1909.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT @FFTQE.

PULLEY.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed May 23, 1984. Serial No. 209,338.

To all whom it may concern:

Be it known that I, HENRY J. GILBERT, a citizen of the United States,residing at Saginaw, in the county of Saginaw and State of Michigan,have invented certain new and useful Improvements in Pulleys, of whichthe following is a specification.

My invention relates to sheet metal pulleys, more particularly those ofthe split or sectional type, and the object thereof is to produce apulley of this character which shall be simple and inexpensive ofmanufacture but durable and efficient in practical use, all as will beapparent from the description hereinafter given.

In the drawings, Figure 1 is a side elevation of my improved pulley Fig.2 a section on the line 2 of Fig. 1; Fig. 3 a plan view of one of thehub clamping sections; Fig. 4 a sectional elevation illustrating amodified form of hub section for use in connection with supplementalspoke arms; and Figs. 5 and 6 detail views of a modified form of hubsection or clamp where only a single set or Y pair of clamping bolts isused.

My pulley comprises, in the present instance and as illustrated in Figs.1, 2 and 3, the rim segments 1, the pair of transverse spoke arms 2, andthe pair of hub sections or clamps 3, together with the sectional hubthimble 4, which may or may not be used as desired. The number of pairsof these spoke arms employed as well as the pairs of hub sections may beincreased according to the width of any particular rim or according tothe strength desired.

The spoke arms are made of channel irons or bars and are arranged flangeto flange, that is, arranged with their flanges directed inwardly towardeach other and toward the division line of the pulley. These spoke armsare expanded centrally to form the shaft opening and to receive the hubthimble where the latter is employed, such thimble being, by preference,secured, as shown, to the spoke arms by rivets 4 The spoke arms areconnected at their outer ends to the rim segments in any suitablemanner, and as the particular connection thereof forms no part of mypresent invention a detailed description and illustration in thisrespect are unnecessary, and it su'lfices to say that these spoke armsare connected, in the present instance, to the rim segments by means ofthe rivets 1 as seen in Fig. 1. r r

- The hubsections, to which my present inl i vention is particularlydirected, are similar in construction and arranged to fit over upon themiddle or hub portions of the spoke arms and to be held or clampedtogether by the clamping bolts 5 which, in the form illustrated in Figs.1, 2 and 3, are four in number arranged in two pairs on either side ofthe spoke arms.

Each hub section is substantially double U-shape in cross-section, withits inner and smaller portion 3 fitting snugly upon the expanded or hubportion of its spoke arm, as clearly indicated in Fig. 2, while itsouter portion 3 is considerably wider than its spoke arm with its topresting upon the top of its spoke arm. In order to support its spoke armand prevent lateral displacement thereof, the ends of each hub sectionhave a pair of parallel tongues 6 which are inwardly folded toward thedivision line of the pulley. These tongues are separated a distance justequal to the width of the spoke arm, with the result that when they areinfolded, as described, their inner adjacent and parallel edges bearagainst the outer parallel sides of the spoke arm. The outer flatsurfaces of each hub section form bolt boxes through which the clampingbolts pass.

As indicated clearly in Figs. 2 and 3, each of the hub sections has twoopposite and laterally directed semi-circular flanges 3 correspondingwith the shaft opening and fitting upon the hub thimble when the latteris employed, but, as will be understood, these flanges may serve thepurposes of a hub thimble, permitting the latter to be dispensed with.The hub sections may be secured to said lateral flanges of the spokearms by means of the rivets b which may, if desired, also extend throughthe hub thimble when the latter is used.

The hub sections, above described, are designed to accommodate a singlepair of spoke arms, but in case supplemental spoke arms at right anglesto the main spoke arms shown in Fig. 1 are employed, such as thesupplemental spoke arms 7 of Fig. 4, then the central expanded portionof each hub clamp or section is made enough wider to receive thesesupplemental spoke arms which are passed through their hub sections. Asindicated in Fig. 1, this expanded ortion 3 of the hubsection receivesits spo. e arm, as in the other instance, and in addition the spoke arms7 on either side of its spoke arm.

- My principle of hub section may be. em-

bodied in a form of clamp or section "having- 3. In F 5 I have shownsuch a hub sect on for a single set of bolts, the same com-'- prislngithe semi-cylindrical portion 3 and,

centrally and longitudinally expanded portion 3 the latter fitting uponand engaging the spoke arm 2. The ends of each hub section are fiat'andrest upon the flat top of its spoke arm. Such ends also havemarginalflanges 3 inwardly turned to engage the spoke arm in the manner clearlyincicated in Fig. 5. The clamping bolts 8 in this particularconstruction pass through the hub clamps or sections and also'throughthe spoke arms 2. In the particular instance, also, the hub clamps orsectionsare secured to their spoke'arms by rivets .9.

I claim:

1. A pulley comprising a rim, spoke arms extending substantiallydiametrically ofthe pulley and approximatelyU-shape in'cross section andconnected with the rim, such arms being centrally expanded to form'theshaft 0 ening, and hub sections cooperating With tie spoke arms and eachcomprising a substantially U sha ed clamp fitting upon its spoke arm andlaying an expanded portion arranged to enga e the expanded centralportion of such spo re arm by fitting the outer face and oppositesides'thereof; substantially as described.

2. A pulley comprising a rim, spoke-arms extending su bstantiallydiametrically of the pulley and approximatelyU-shapein cross section andconnected with the rim, such arms being centrally expanded to form'theshaft opening, and hub sections cooperating with the spoke arms andeachcomprising a substantially U-shaped clamp fitting upon its spoke armand having an expanded portion arranged to engage the expanded centralportion of suchspoke arm by fitting the outer face and opposite sidesthereof, each of said hub sections having laterally directedsemi-circular flanges corresponding with the shaft opening;substantially as described.

3. A pulley comprising 'a rim,-spoke arms approximately U-shape in crosssection and connectedtherewith, such arms being centrally expanded toform the shaft opening, hub sections cooperating with the spoke arms andeach comprising a substantially U-shaped clamp fitting upon its spokearmand having an expanded portion closed at its'top and arranged to engagethe expanded central portion of such spoke arm by fitting the outer faceand opposite sides thereof,

and a hub thi'mble upon which such'hub sections are clamped;substantially as described. 4. A pulley'comprising arim,'spoke arms.

extending substantially diametrically of the pulley and approximatelyU-shape in cross section and connected with the rim, such arms beingcentrally expanded to form the shaft opening, hub sections cooperatingwith the spoke arms and each comprising a substantially U-shaped clamphaving an expanded portion closed at its top and arranged to engage theexpanded central portion of its spoke arm and having aflat portion forclamping purposes and fitting'upon the spoke arm, and clamping boltspassed through the'hub sections forclamping-them together;substantiallyas described.

5. Apulley comprising a rim,-spoke arms extending su bstantiallyoiametricallyof the pulley and approximately U-shapein cross section andconnected with the rim, such arms being centrally expanded to form theshaft opening, hub sections cooperating withthe spoke arms andeachcomprising a substantially "ti-shaped clamp having an expandedportionclosed atits top and arranged to engagetheexpanded-central portion ofits spoke arm and having a fiat-portionfor'clamping purposes andfittingupon the spoke arm, said hub sections having means for preventinglateral displacement of the spoke arms, and clamping bolts passedthrough-the hub sections for c'lamping'them together; substantially asdescribed.

6. A pulley comprising arim,'spoke arms approximately U-shaped in crosssection and connected-therewith, such arms being-centrally expanned toform the shaft opening, hub sections cooperating with the spoke arms andeach comprising a substantially U- shaped clamp having anexpandedportion arranged to engage the expanded central portion'ofitsspoke arm-and'havinga fiat portion for clamping purposes,'said'hubsections havingat their ends-means forengaging the spoke armsand'preventing thelateral displacement of-the'latter, consisting of twoseparate inturned tongues ateach end, and clamping bolts passed throughthe'hub sections for clam ing them together; substantially as described.

7. A pulley comprising a rim, spoke arms approximately U-shape I incross section and connected therewith, such arms being centrallyexpanded to form'the-shaft opening, hub sections cooperating with thespoke arms and each comprising a-substantially U-shaped clamp having anexpanded portion arranged to engage the expanded central portion of itsspoke-arm and having a flat portion for clamping purposes, said hub sections having infolded tongues arranged to bear against the oppositesides of thespoke arms, and clamping bolts passed through the hubsections for clampingthem together; substantially as described.

8. A'pulley comprising a rim, spoke arms approximately U-shape in crosssection and connected therewith, such'arms being centrally expanded toform the shaft opening, hub section's cooperating with the spoke armsand each comprising a substantially U-shaped clamp having an expandedportion arranged to engage the expanded central portion of its spoke armand having a flat por tion for clamping purposes, said hub sectionshaving pairs of infolded tongues provided with straight parallelsurfaces arranged to bear against the opposite parallel sides of thespoke arms, one pair of such tongues being arranged at each end, andclamping bolts passed through the hub sections for clamping themtogether; substantially as described.

9. A pulley comprising a rim, spoke arms extending substantiallydiametrically oi the pulley and approximately U-shape in cross sectionand connected with the rim, such arms being centrally expanded to formthe shaft opening, hub sections cooperating With the spoke arms and eachcomprising a substantially U-shaped clamp having an expanded portionarranged to engage the expanded central portion of its spoke arm andhaving a flat portion for clamping purposes and fitting upon the spokearm, means for securing the spoke arms and hub sections together, andclamping bolts for clamping the hub sections together; substantially asdescribed.

10. A pulley comprising a rim, spoke arms approximately U-shape in crosssection and connected therewith, such arms being centrally expanded toform the shaft opening, hub sections cooperating with the spoke arms andeach comprising a substantially U-shaped clamp having an expandedportion arranged to engage the expanded central portion of its spoke armand having a fiat portion for clamping purposes, said hub sec tionshaving means for preventing lateral displacement or" the spoke arms,comprising a pair of tongues 6 at each end, and pairs of clamping boltspassed through said sections on either side of the spoke arms;substantially as described.

11. A split pulley, each half comprising a rim segment 1, spoke arm 2extending substantially diametrically and approximately U-shaped incross section, such arm being centrally expanded to form a shaftopening, a hub section comprising a centrally expanded portion fittingover the centrally expanded portion of the spoke arm and having ilatportions 3 for clamping purposes, the ends of the hub section havingpairs of inwardly directed tongues 6, Whose adjacentedges bear againstthe outer sides of the U-shaped spoke arm, pairs of clamping bolts 5cooperating With said portions 3*, and a hub thimble 4 secured to theexpanded central portion of the spoke arm; substantially as described.

12. A pulley comprising a rim, spoke arms approximately U-shape in crosssection and connected with the rim, and hub sections cooperating Withthe spoke arms and each comprising a substantially U-shape clamp fittingupon said spoke arms and provided at each end with means closelyengaging the same to prevent lateral displacement; substantially asdescribed.

13. A pulley comprising a rim, spoke arms approximately U-shape in crosssection and connected with the rim, and hub sections cooperating vviththe spoke arms and each comprising a substantially U-shape clamp fittingupon said spoke arms and provided at each end with depending paralleltongues 6 closely engaging the same to prevent lateral displacement;substantially as described.

14:. A pulley comprising a rim, spoke arms approximately U-shape incross section and connected with the rim, said spoke arms beingcentrally expanded to form the hub opening, and hub sections cooperatingWith the spoke arms and each comprising a substantially U-shape clamphaving correspondingly expanded central portions fitting closely uponsaid spoke arms; substantially as described.

HENRY J GILBERT.

Witnesses i S. E. HIBBEN,

LOUIS B. ERWIN.

